Switching 'modes' with an IF but keep looping

Projects Programming
1

Finding coding incredibly difficult but i'm having fun learning.

I have managed to cobble together code to do what I want (understanding most of it) but i'm struggling trying to push things further.

Code A works to display temperature, time passed (I know I am not using day() correctly but it does what I need), and works basically as a thermostat. Stangely, some of the static text printed to the LCD blinks when I turn the pot but I can live with that.

I would like a push button to switch between this 'mode' and a second 'mode' displaying data from a different sensor.

My basic implementation, (Code B) switches as I want but the code no longer loops - so the temperature data or the pot value isn't updated.

In short, (sorry about my length) how would I switch between two 'modes' whilst still being able to see sensor data?

codeA.ino (8.41 KB)

codeB.ino (9.78 KB)

6

Struggling with this. Used code from: https://www.arduino.cc/en/tutorial/switch

Don't really know where to go from here.

I think you are suggesting that each button press should set a mode variable rather than execute direct code.

I just don't know how! Story of my life :frowning:

I get:

if mode == 0 then display one thing
    if mode == 1 then display something else
    if mode == 2 then display something else.

Just not sure how to set that variable on button press

8

Thank you - have it working now.

Still have some of the static text printed to the LCD blinks when I turn the pot but at least everything is functioning.

Thanks again.

9

The pieces of code that should run when the different modes are selected should be put into functions. Then you can have code in loop() something like this

void loop() {
   checkButtonsAndUpdateMode();
   if (mode == 1) {
      functionForMode1();
   }
   else if (mode == 2) {
     functionForMode2();
   }
   else {
     functionForMode3();
   }
}

See how functions are used in Planning and Implementing a Program

...R